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DTSTART;TZID=Europe/London:20230919T130000
DTEND;TZID=Europe/London:20230919T143000
DTSTAMP:20260505T051303
CREATED:20230712T114240Z
LAST-MODIFIED:20230808T123932Z
UID:4153-1695128400-1695133800@thomasyoungcentre.org
SUMMARY:MMM Hub Software Spotlight: CASTEP on the GPU - A crossover Tier-2 HPC virtual training event
DESCRIPTION:Venue: ONLINE \n\n\n\n\n\n\n\n\n\n\nMMM Hub Software Spotlight: CASTEP Share on X\n\n\n\n\nSpeaker: Phil Hasnip\, University of York \n\n\n\nWe are excited to announce a ‘software spotlight’ event across the MMM Hub\, N8\, and CSD3 Tier-2 consortia\, to showcase a brand new release of the popular ‘CASTEP’ materials modelling package\, which now features significant GPU acceleration. We welcome Phil Hasnip from York\, who will showcase the capabilities of the CASTEP package from a research perspective and will use live demonstrations to show how the code can be efficiently run in practice – in particular multinode and new GPU acceleration capabilities on the ‘Young’ HPC infrastructure. \n\n\n\nWith demand for GPUs at historic highs (HPE leadtimes on new GPUs are at 52 weeks)\, we are very lucky to have access to the A100 GPUs on Young\, which provide large amounts of RAM and compute enabling large simulations. This talk will provide an opportunity for CASTEP users to switch from a CPU implementation to use these currently underused GPU resources. \n\n\n\nJoin Zoom Meetinghttps://ucl.zoom.us/j/99746496587?pwd=UUJHeFBzU3p1a0crTEh2T1lrNUFrUT09 \n\n\n\nMeeting ID: 997 4649 6587Passcode: TYCSWS
URL:https://thomasyoungcentre.org/event/mmm-hub-software-spotlight-castep/
CATEGORIES:Main event
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BEGIN:VEVENT
DTSTART;TZID=Europe/London:20230920T093000
DTEND;TZID=Europe/London:20230922T170000
DTSTAMP:20260505T051304
CREATED:20230330T135633Z
LAST-MODIFIED:20230920T182334Z
UID:3961-1695202200-1695402000@thomasyoungcentre.org
SUMMARY:Twistronics of 2D materials: from modelling to real systems
DESCRIPTION:Twistronics of 2D materials: from modelling to real systems Share on X\n\n\n\n\nVenue: National Graphene Institute of the University of Manchester (in-person\, talks can be attended remotely via zoom) \n\n\n\nStacked van der Waals multilayers exhibit a moiré pattern if the constituent monolayers have different lattice constants or are twisted relative to each other. These moiré patterns give rise to fascinating new properties\, including correlated insulator states\, unconventional superconductivity\, flat electron and phonon bands\, moiré excitons as well as topological states. Example systems include twisted bilayer graphene or twisted bilayers of transition metal dichalcogenides. Despite many advances\, these moiré materials remain challenging to study from a theoretical point of view because they combine two unique challenges: (i) the unit cells of moiré materials are extremely large often containing thousands of atoms and (ii) electrons in these materials are strongly correlated. As a consequence\, there are no “off-the-shelf” methods and computer codes available for the modelling of these materials. \n\n\n\nOur workshop aims to bring together researchers from different modelling communities (including those using atomistic ab initio approaches\, continuum approaches\, emergent moiré lattice models\, topological methods\, strong correlation as well as excited state and non-equilibrium techniques) as well as experimentalists to identify synergies and possible ways forward. \n\n\n\nTo make the workshop accessible for students\, we will begin each topical session with a tutorial talk that introduces the relevant concepts. \n\n\n\nThe workshop will be run jointly by the UK’s National Graphene Institute (Manchester)\, the Thomas Young Centre for Theory and Simulation of Materials (London)\, and the Sir Henry Royce Institute and has received funding from the Psi-k Charity (http://psi-k.net/)\, CCP9 and the Institute of Physics. \n\n\n\n \n\n\n\nRegistration fee: attendance of the workshop is free \n\n\n\n \n\n\n\n\nRegister here\n\n\n\n\n\n\n\n\nWednesday\, September 20  \n\n\n\n09.30: Arrival\, registration\, coffee10.00: Welcome (Vladimir Falko) \n\n\n\n10.10: Session 1: Twisted graphene materials I (Chair: Nicholas Hine)10.10: Tim Kaxiras (invited): Twisted bilayer graphene revisited: where is the “magic”?10.40: Niels Walet (contributed): Electronic structure inside the domain walls of twisted and strained graphene layers11.00: Alessandro Principi (contributed): Interlayer electron-hole friction in tunable twisted bilayer graphene semimetal11.20: Angelika Knothe (invited): Regular and chaotic electron dynamics in ballistic (twisted) bilayer graphene cavities11.50: Darryl Foo (contributed): Extended magic phase in twisted graphene multilayers \n\n\n\n12.10: Lunch & Poster session \n\n\n\n13.30: Session 2: Twisted graphene materials II (Chair: Dahlia Klein)13.30: Sid Parameswaran (invited): A Spiral Twist to the “Normal” State of Moiré Graphene14.00: Sankalpa Ghosh (contributed): Moiré fractals in twisted graphene layers14.20: Irina Grigorieva (invited): Magnetic-field induced phase transition in heterostructures based on unconventional superconductor PdBi214.50: Mohammed Al Ezzi (contributed): Topological Flat Bands in Graphene Super-moiré Lattices \n\n\n\n15.10: Coffee break \n\n\n\n15.30: Session 3: Twisted graphene materials III (Chair: Kristian Thygesen)15.30: Artem Mishchenko (invited): Moiré effects in thick graphitic films with surface layer aligned with hBN 16.00: Mei-Yin Chou (contributed): Origin of Magic Angles in Twisted Bilayer Graphene: The Magic Ring16.20: Maxim Trushin (contributed): Electron pairing across a band intersection may create a highly conductive state16.40: Francesco Guinea (invited): Superconductivity in graphene stacks. \n\n\n\nThursday\, September 21 \n\n\n\n09.20: Session 1: Twisted TMDs I (Chair: Neil Drummond)09.20: Steven Louie (invited): Excitons and photophysics of 2D van der Waals structures09.50: Sufei Shi (invited): Valley-polarized Exitonic Mott Insulator in WS2/WSe2 Moiré Superlattices \n\n\n\n10.20: Coffee break \n\n\n\n10.40: Session 2: Twisted TMDs II (Chair: Sid Parameswaran)10.40: Brian Gerardot (invited): Optically probing correlated states in mult-orbital moiré systems11.10: Andres Grandos del Aguila (contributed): Ultrafast exciton fluid flow in an atomically-thin MoS2 semiconductor11.30: Guang-Yu Guo (contributed): Ab initio studies of nonlinear optical responses of 2D semiconductors11.50: Samuel Magorrian (contributed): One-dimensional confinement in moiré superlattices of twisted 1T’-WTe2 bilayers12.10: Sergey Slizovskiy (contributed): Kagome quantum oscillations in graphene superlattices \n\n\n\n12.30: Lunch & Poster session \n\n\n\n13.30: Session 3: Twisted TMDs III (Chair: Angelika Knothe)13.30: Adina Luican-Mayer (invited): Scanning Tunneling Microscopy of twisted 2D semiconductors14.00: Andor Kormanyos (contributed): Induced spin-orbit coupling in twisted graphene-TMDC heterobilayers14.20: Kristian Thygesen (invited): Emergent properties of van der Waals bilayers revealed by computational stacking \n\n\n\n14.50: Coffee break \n\n\n\n15.10: Session 4: Twisted TMDs IV (Chair: Sarah Haigh)15.10: Nicholas Hine (invited): Combining Large Scale DFT and Machine Learned Interatomic Potentials to Simulate Twisted Bilayers\, Heterostructures and Alloys of 2D Materials15.40: Pierre Pantaleon-Peralta (contributed): Designing Moiré Patterns by Strain16.00: Aitor Garcia-Ruiz (contributed): FE polarization in mixed-stacking graphene tetra layers \n\n\n\nFriday\, September 22 \n\n\n\n09.20: Session 1: (Chair: Sufei Shi)09.20: Sarah Haigh (invited): Understanding Twisted 2D material heterostructures Using Scanning Transmission Electron Microscopy09.50: Neil Drummond (invited): Adhesion of Graphene to Hexagonal Boron Nitride \n\n\n\n10.20: Coffee break \n\n\n\n10.40: Session 2: (Chair: Brian Gerardot)10.40: Dahlia Klein (invited): Atomic SET: a new technique for high-resolution potential imaging11.10: Lorenzo Sponza (contributed): Electronic structure and optical response of twisted boron nitride bilayers11.30: Sushant Kumar Behera (contributed): Engineering Moiré Potential Induced Electronic Structure in van der Waals heterostructure11.50: Allan MacDonald (invited): Magic Angles and Fractional Chern Insulators in Twisted Homobilayer TMDs12.20: Closing (Johannes Lischner) \n\n\n\nOrganizers:Johannes Lischner (Imperial College London\, j.lischner@imperial.ac.uk)Vladimir Falko (University of Manchester\, Vladimir.Falko@manchester.ac.uk) \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nhttps://www.royce.ac.uk/events/twistronics-of-2d-materials-from-modelling-to-real-systems/
URL:https://thomasyoungcentre.org/event/twistronics-of-2d-materials-from-modelling-to-real-systems/
CATEGORIES:Main event
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BEGIN:VEVENT
DTSTART;TZID=Europe/London:20230927T160000
DTEND;TZID=Europe/London:20230927T170000
DTSTAMP:20260505T051304
CREATED:20230814T102131Z
LAST-MODIFIED:20230927T102116Z
UID:4291-1695830400-1695834000@thomasyoungcentre.org
SUMMARY:*CANCELLED due to illness* TYC Highlight Seminar: Photophysics of two-dimensional materials and moiré structures
DESCRIPTION:Venue: G20 in the Royal School of Mines (Dept of Materials)\, Imperial College London \n\n\n\n\n\n\n\n\n\n\n*CANCELLED due to illness* TYC Highlight Seminar: Photophysics of two-dimensional materials and moiré structures Share on X\n\n\n\n\nSteven G. Louie – University of California at Berkeley\, and Lawrence Berkeley National Lab \n\n\n\nAbstract: Enhanced many-electron interactions\, strong spatial/environmental-dependent screening\, as well as distinct topology in reduced-dimensional systems often lead to novel phenomena of fundamental and technological interests. In this talk\, I present some recent progress along this direction in the photophysics of some systems of current interest\, including atomically thin two-dimensional (2D) materials and their moiré structures. Different measurements and phenomena entail different levels of conceptual/theoretical treatments. Their understanding and prediction are a challenging quantum many-body problem. We address this problem employing an ab initio interacting n-particle Green’s function approach. \n\n\n\nSome fascinating phenomena discovered in recent studies are presented – e.g.\, strongly bound excitons (electron-hole pairs) with highly unusual level structures and optical selection rules; unique moiré excitons in van der Waals heterostructures; tunable magneto-optical & plasmonic properties; prominent correlated 3- and 4-particle excitations; exciton enhanced nonlinear optical responses; remarkable field-driven nonequilibrium and time-dependent effects in pump-probe measurements\, etc. Our latest ab initio field-driven studies lead to the discovery of a self-driven exciton-Floquet effect as well as the discovery of a strikingly new phenomenon of formation of light-induced shift current vortex crystals in van der Waals moiré systems. The richness of the photophysics of these materials add to their promise for exploration of new science and valuable applications. \n\n\n\nBio: Steven G. Louie received his Ph.D. in physics from the University of California at Berkeley in 1976.  After having worked at the IBM Watson Research Center\, Bell Labs\, and U of Penn\, he joined the UC Berkeley faculty in 1980\, where he is Distinguished Professor of Physics and a Senior Faculty Scientist at the Lawrence Berkeley National Lab.  He is an elected member of the National Academy of Sciences\, the American Academy of Arts & Sciences\, the Academia Sinica (Taiwan)\, and a foreign member of the Chinese Academy of Sciences\, as well as a fellow of the American Physical Society (APS)\, the American Association for the Advancement of Science\, and the Materials Research Society (MRS). \n\n\n\nHe is a recipient of the APS Aneesur Rahman Prize\, the APS Davisson-Germer Prize\, the MRS Materials Theory Award\, the Foresight Institute Richard Feynman Prize\, the DoE Award for Sustained Outstanding Research in Solid State Physics\, as well as named Jubilee Professor of Chalmers University of Technology\, Ørsted Lecturer of Technical University of Denmark\, and Benjamin Lee Professor Award of the Asia Pacific Center for Theoretical Physics\, among others.  Louie’s research spans a broad spectrum of topics in condensed matter physics and nanoscience.  He is known for his pioneering development of the ab initio GW method and for his studies of novel bulk and reduced-dimensional systems.
URL:https://thomasyoungcentre.org/event/tyc-highlight-seminar-photophysics-of-two-dimensional-materials-and-moire-structures/
CATEGORIES:Main event
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